18 replies to this topic

[Zoobeef]

Considering a little weight saving, I don't need a speedo but will have to keep it to stop the ecu playing up but I can get rid of the metal part.

I found a thread from Jimmy when he did it but he didn't really say what he did. Guessing I need a couple of T pieces and then some pipework to join it up?

Also, should I join the systems so its f-f and r-r or do it fl-rr and rl-rr?

 

Any pictures of anyone that's done it?

[The Batman]

You want mr jimmys number to give him a bell? You getting rid of the servo aswell?

[NOSBandit]

Considering a little weight saving, I don't need a speedo but will have to keep it to stop the ecu playing up but I can get rid of the metal part. I found a thread from Jimmy when he did it but he didn't really say what he did. Guessing I need a couple of T pieces and then some pipework to join it up? Also, should I join the systems so its f-f and r-r or do it fl-rr and rl-rr?   Any pictures of anyone that's done it?

I think it's normally connected diagonally with a bias control to rear Sent from my SM-G935F using Tapatalk

[Zoobeef]

Does the abs unit have any built in bias control? As the rest of the system will stay the same.

 

Wasn't planning on getting rid of the servo, no time to get used to driving without it really. Ill fire him a message on fbook.

[Zoobeef]

That should have been FL-RR and FR-RL in my first post.

[The Batman]

Take mine out next time and see if you like the no servo feel!

[Nev]

Isn't the all important electonic rear DRP somehow in the ABS unit? I once artificially switched it off by disconnecting 2 ABS sensors as an experiment and my car was spinning round in circles when braking at just 30 MPH...

Edited by Nev, 02 April 2017 - 03:05 AM.

[slindborg]

When Jimmy was looking at it I think we found that a bog spec MK4 AStra was supplied without ABS, but had ABS brake lines (ease of mfr) so it had a fluid distribution block in place of the ABS module. Might work a charm for you.

 

Then you "just" need an ABS sensor to 5V pulse generator (I was looking at them many years ago and they are easy to make, or ask Garw very very very nicely if he can help )

[Zoobeef]

Cheers, it's impossible to find the block on ebay so I'll have to try out the scrap yard, although mine doesn't like selling brake lines so hopefully it's OK with the block!

[chickendippers]

Got an early Astra MK4 here about to go for scrap, if you let me know what part you need you're welcome to it.

[Craig S]

Isn't the all important electonic rear DRP somehow in the ABS unit? I once artificially switched it off by disconnecting 2 ABS sensors as an experiment and my car was spinning round in circles when braking at just 30 MPH...

 

I have had 2 disconnected (1 front 1 rear) for years and never spun so I would say no.

[Zoobeef]

Spoke to Jimmy and he says he thinks some bias control is within the ABS block. If that's the case then I'd need to fit a biasvalve. I'm not sure I want to use qualifying as a test session :/

[slindborg]

 I'm not sure I want to use qualifying as a test session :/

 

fanny

[Arno]

Spoke to Jimmy and he says he thinks some bias control is within the ABS block. If that's the case then I'd need to fit a biasvalve. I'm not sure I want to use qualifying as a test session :/

 

VX == same identical brake calipers and disc sizes as Elise S1 and S2

 

Un-assisted S1 and S2 Elise == no bias valve at all, straight-bore MC

 

Unless the VX MC has a stepped bore then it should have the same brake balance/behaviour as a regular Elise when the ABS unit is completely removed and the pipes connected to the MC directly.

 

Only difference remaining between the VX and an S1 or Rover-S2 Elise when taking out the ABS is the vacuum assist and different MC as a result. VX uses a bigger bore MC as the vacuum assist helps with the pedal effort.

 

If the vacuum assist is (also) removed on a VX then you must (retro)fit the non-assisted MC from an Elise or you end up with a rock-hard pedal and little brake retardation on the VX.

 

Feel may be a little different as the VX pedal box has slightlly different pedal pivot points/ratios than the original extruded ali Elise pedal setup, but that should not be too severe.

 

Bye, Arno.

[Exmantaa]

The ABS has some Rear Proportioning function build in. that is disabled if you disconnect both a front sensor AND a rear sensor.

If you have oversized brakes at the rear, better keep that function in operation...

[bladerunner]

 

Spoke to Jimmy and he says he thinks some bias control is within the ABS block. If that's the case then I'd need to fit a biasvalve. I'm not sure I want to use qualifying as a test session :/

 

VX == same identical brake calipers and disc sizes as Elise S1 and S2

 

Un-assisted S1 and S2 Elise == no bias valve at all, straight-bore MC

 

Unless the VX MC has a stepped bore then it should have the same brake balance/behaviour as a regular Elise when the ABS unit is completely removed and the pipes connected to the MC directly.

 

Only difference remaining between the VX and an S1 or Rover-S2 Elise when taking out the ABS is the vacuum assist and different MC as a result. VX uses a bigger bore MC as the vacuum assist helps with the pedal effort.

 

If the vacuum assist is (also) removed on a VX then you must (retro)fit the non-assisted MC from an Elise or you end up with a rock-hard pedal and little brake retardation on the VX.

 

Feel may be a little different as the VX pedal box has slightlly different pedal pivot points/ratios than the original extruded ali Elise pedal setup, but that should not be too severe.

 

Bye, Arno.

 

 

So the way I interpret this, is that the easiest way to remove the ABS is to replace the current master cylinder with an elise S1/S2 non ABS type. I'm guessing that the brake lines would need modifying because of the removal of the ABS unit and the different MC. I have driven an S1 Elise (non assisted) and much preferred the brake feel compared to my VX.

 

[Zoobeef]

I assume the vx MC is connected in diagonals to the braking system? In which case it wouldn't be stepped.

[Bargi]

This looks like effort > gain. Yo u gonna have time to properly test before racing? Sent from my SM-G920F using Tapatalk

[Bargi]

Besides, VX needs weight over the front � Sent from my SM-G920F using Tapatalk